93.1.1 How to Configure Historical Sessions Using an Oracle Platform

Oracle9i Database (or later) automatically maintains historical versions of objects and extends SQL with an AS_OF clause used to query this historical data. Oracle refers to these as flashback queries.

93.1.2 How to Configure Historical Sessions Using a TopLink HistoryPolicy

If you use a schema that you designed to maintain historical versions of objects and if that schema can be described by TopLink HistoryPolicy, you can query the historical versions of objects maintained by your database in accordance with your schema.